Taro Aso on Kingmaker Role in Politics
TL;DR
Taro Aso utilizes his strong factional control and deep party connections to decisively influence leadership selection within Japan's ruling party.
Key Points
He solidified his kingmaker status by supporting Sanae Takaichi at the last moment in the 2025 LDP presidential election, ensuring her victory.
He leads the Shikōkai faction within the LDP, which is one of the powerful internal groups determining party leadership and policy direction.
Following the 2025 election where Takaichi won, Aso was re-appointed as the LDP's vice president, indicating his restored high-ranking influence.
Summary
Taro Aso is widely regarded as an effective political power broker, or kingmaker, within Japan's ruling Liberal Democratic Party (LDP) due to his continued leadership of the influential Shikōkai faction. Even after serving as Prime Minister (2008–2009) and subsequently as Deputy Prime Minister and Finance Minister (2012–2021), he retains significant leverage over party decisions, particularly in succession contests. This status was reaffirmed when he acted as a pivotal figure in the 2025 LDP presidential election, where his factional maneuvering secured a come-from-behind victory for the eventual winner. His ability to command loyalty and orchestrate support among key voting blocs positions him as a crucial arbiter of power in the party's internal politics.
The evolution of Aso's role has seen him transition from a direct contender for the top job to a behind-the-scenes influencer, often compared to other major internal power brokers. His influence stems from his hereditary political background and his mastery of the LDP's traditional factional machinery, which, despite recent scandals and dissolution efforts, remains central to governance. When major leadership contests occur, his endorsement or strategic maneuvering can decisively tilt the outcome, effectively confirming the next leader of the party and, by extension, the nation's prime minister.
Key Quotes
...the fact that the Aso faction decided to support Suga, despite supposedly not being close to him, is also extremely critical (for Suga's overwhelming support)
Frequently Asked Questions
Taro Aso currently acts as a significant kingmaker within the LDP through his continued leadership of the powerful Shikōkai faction. His support is crucial in leadership contests, as demonstrated by his decisive role in the 2025 presidential election. He leverages personal connections and factional loyalty to tilt the balance of power toward his preferred candidates.
While his career has included direct leadership roles, such as Prime Minister from 2008 to 2009, his kingmaker role solidified during his long tenure as Deputy Prime Minister and Finance Minister. Even when he did not seek the top post himself, he used his position to maintain influence over the selection of his successors.
Taro Aso's influence is rooted in his deep involvement in the LDP's core factional structure, which has historically dictated leadership outcomes. In the recent 2025 LDP election, his strategic backing was cited as the key element that created a come-from-behind victory for the winner, highlighting his contemporary power in political outcomes.
Sources8
Kishida May Pay a Price, but Has Handled LDP Scandal Shrewdly
Tarō Asō - Wikipedia
Taro Aso: The Rise of a Power Broker in the LDP
Takaichi Sanae's LDP Shifts Right with Hardline Appointments
Who Will Lead the LDP, Media Darling or Conservative Standard-Bearer? | JAPAN Forward
The woman poised to be Japan's first female prime minister faces challenges | kare11.com
Meet the 'shadow shogun' behind the making of Japan's next prime minister
The CSPC Dispatch - July 25th, 2025 — Center for the Study of the Presidency and Congress
* This is not an exhaustive list of sources.